1997 Ski-Doo Factory Shop Manual Volume Two, Page 121Get this manual
Section 03 ENGINE Sub-Section 09 (ROTARY VALVE, COOLANT PUMP AND RESERVOIR)
18,19, Pump Housing Bolt and Loctite 242 (Blue)
420 8765 00
Apply Loctite 242 (blue) on bolt threads
Rotary Valve
The rotary valve controls the opening and closing of the inlet portsTherefore its efficiency will depend on the precision of its installationIDENTIFICATION OF THE ROTARY VALVE There is no identification code on the valveTo find out the duration, place an angle finder on the valve and measure the valve cut-out angleEngine Type 454 494 583 MX Z, GT and Formula 583Z 583 Summit 670 Rotary Valve PN 420 924 XXX 502 509 502 509 500 Valve Duration (Cut-out Angle) 159 147 159 147 164
A16C19A
4,6, Rotary Valve Shaft and Loctite 648
CAUTION